class SvEntity {
  String val;
  //提前生成的推广标识
  String joinId = "";
  SvEntity({this.val, this.joinId});

  SvEntity.fromJson(Map<String, dynamic> json) {
    val = json['val'];
    joinId = json['joinId'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['val'] = this.val;
    data['joinId'] = this.joinId;
    return data;
  }
}
